Aerator



FIG. 1 is a perspective view of an aerator showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being identical thereto;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for an aerator, as shown and described. 